Paint and varnish remover.



JOHN M. WILSON, 01F MONTCLAIR, NEW JERSEY, AND CHARLES N. FORREST, OFBROOK- LYN, NEW YORK, ASSIGNO RS, BY MESNE AS SIGNMENTS, TO WILSONREMOVER COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION 015 NEW JERSEY.

PAINT AND vnamsn nnmovnn.

To all whom it may concern Be it known that we, JOHN M. WILSON andCHARLES N. FORREST, citizens of the- United States, residing atMontclair, New Jersey, and Brooklyn, New York, respectively, haveinvented new and useful Improvements in Paint and Varnish Removers, ofwhich the following is a specification.

Our invention relates to improvements in that class ofpaint and varnishremovers which contain wax or analogous substances, either in solutionor suspension therein and has for its objects the production of amixture in which the wax is permanently maintained in its originalcondition and which is capable of producing an extremely tenacious andimpervious film, upon thesuperficial evaporation of the solventtherefrom.

Heretofore in the production of paint and varnish removers, it has beencustomary, because of their excellent solvent properties,

-to utilize alcohols, and particularly methyl and ethyl alcohols. Owinghowever to the gradual and protracted action of the alcohol used, uponoxidized films of linseed oil, it is essential, in those cases where themixture is to be exposed to atmospheric influences, that wax or otherfilm-forming substances be incorporated in the said mixture, wherebyupon the superficial evaporation of the alcohol, a thin film or envelopwill be deposited, which will efl'ectually prevent the evaporation ofthe remaining alcohol.

Mixtures containing wax and similar substances in suspension therein,soon deteriorate, especially inthe cold, owing -to the gradualdeposition of the Wax particles, which segregate at the bottom of thesolution, with .the result that the supernatant liquid is clear andpractically free from wax. The finely precipitated wax, suspended inthese mixtures, is also objectionable, owinggto the fact that inpractice it not only settles upon and coats the surfaces to be treatedand tends to prevent the contact of the alcoholic solvent with thevarnished surface, but also it settles in andclogs up the pores of thewood. Thus the removal of the wax becomes equally as diflicult as theremoval of the original varnish without the application of a paintremover.

Our experiments have led to the discovery, that if the relativequantities of the Specification of Letters Patent.

Application filed July 13, 1906. Serial No. 326,118.

components of the mixture be suitably apportloned, a clear solution ofalcohol, benzol (benzene) and wax can be obtained, at temperaturesvarying between 20 to 32 C. When varlous thickening agents are dissolved1n suitable solvents and mixed with the above clear solutions, both thecrystalllzatlon and deposition of the wax from the said solution can beprevented at normal temperatures.

The above mixture when applied to varnished surfaces, acts directly uponthe said varnish, as opposed to the indirect action through anintermediate layer of wax, above noted, owing to the fact that the waxdeposits as a film on the surface of the liquid only and occludes thealcoholic solvent of the varnish.

In carrying out our invention, we prefer to proceed as follows: Oneouart of alcohol, preferably ethyl or methyl, is gradually added withstirring, to a solution of two and one-half ounces of paraffin-wax inthree quarts of benzol (benzene). To the above mixture is then addedwith constant stirring, two and one-half ounces of nitro-cellulosesolution of a specific gravity of from .85 to .90 at normaltemperatures. The said nitrocellulose solution contains approximately92.5% of solvent and 7.5% of residue, the solvent preferably comprisingethyl acetate and alcohol. The solution thus obtained, possesses all ofthe desirable properties of wax-containing paint and varnish removers,

is capable of producing a more impervious and tenacious film than thosenot containing gun-cotton and moreover it does not deteriorate instorage. Owing to the viscosity of our paint and varnish remover, due tothe dissolved gun-cotton therein, its value for application to verticalwalls or overhead surfaces is greatly enhanced since there is anvention,various other solvents such for example as propyl or amyl alcohols maybe substituted therefor without departing from pable'of yielding a soft,

the spn'it of our inventio Having thus described our invention, What weclaim is:

1. A composition of matter comprising three quarts of benzol, one quartof alcohol, two and one-half ounces of parafiin-wax, and two andone-half ounces of nitro-cellulose dissolved in a suitable solutecontaining about 7% of gun-cotton, substantially as described.

2. A paint and varnish remover, comprising an alcoholic solvent of driedfilms of paint'and varnish, nitro-cellulose in solution therein,

is capable of existing as a solid at normal temperatures, and is capableof uniting with said nitro-cellulose and producing therewith a soft, yettenacious, impervious and substantially non-adhesive superficial filmupon-the superficial evaporation of the alcohol, and to substantiallyprevent the formation of a hard, adhesive film upon the completeevaporation of the said alcohol, said composition of matter beingextremely slow-drying, an active solvent of dried films of linseed oiland shellac and cayet tenacious film having litle affinity for thesurfaces to which the mixture is applied, upon the evaporation of thealcohol.

3. A paint and varnish removencomprising an alcoholic solvent of driedfilms of paint and varnlsh, wax, a wax-solvent contalmng the benzenerlng and a n1tro compound of cellulose in solutlon in said mixand anormally non-volatile compound which names to this specification ture,the said composition of matter being extremely slow-drying, an activesolvent of dried films of linseed capable of yielding soft, yettenacious superficial films, having little afiinity for the surfaces towhich the mixture is applied upon the evaporation of the alcohol.

4. A paint and varnish remover, comprising a liquid solvent of driedfilms of paint and varnish, including a wax solvent and aWaxprecipitant, a compound containing the cellulose radical, and a waxycompound capable'of physical union with the said compound containing thecellulose radical, with the resultant formation upon the superficialevaporation of the volatile liquids, of a soft, yet tenacioussuperficial film having little aflinity for the surface to which themixture is applied.

5. ,The substantially fluent finish remover consisting essentially ofcomposite volatile finish softening material including loosening finishsolvent material and incorporated evaporation retarding stiffeningmaterial including suflicient soluble nitro-cellulose to have asubstantial stiffening action and dissolved mineral wax.

In testimony whereof, we have signed our in the resence oftwosubscribing witnesses, this 1 1inth) 9th day of July 1906.

.JOHN M. WILSON.

CHARLES N. FORREST.

Witnesses:

J. K. 'WOODHALL, WM. F. Woon.

oil and shellac and 40

